Hairpin



p 1949 R. N. GERNHEUSER 2,482,259

- HAIRPIN Filed Jan. 27, 1947 IE-E IN VEN TOR. 11 032127 N. EERNHE USER Patented Sept. 20, 1949 HAIRPIN i Robert N. Gernheuser, Toledo, Ohio, assignor to. Gernheuser Industries, Inc., Toledo, Ohio, at

corporation of Ohio Application January 27, 1947, Serial No. 724,626 i This invention relates tohairpins of the bobby type and an object of this invention is to produce a pin of the type described having readily formedand simple hair gripping means for preventing inadvertent relative movement of the pin from the hair-gripping position.

Another object is to produce a bobby pin having a pair of hair gripping arms joined by means of a novelconstruction which not only increases the useful life of the pin'but enhances the resiliency and gripping action of the arms.

A further object is to produce a hobby pin having a pair of resilient arms formed with multiple angularly arranged hair gripping channels by means of which the pin is retained in the hair gripping position.

These and other objects and advantages will become apparent from the following description and claim and for purposes of illustration but not of limitation, embodiments of the invention are shown in the accompanying drawings, in which Figure 1 is a side elevational view of a bobby pin embodying the features of this invention;

Figure 2 is a View from the bottom side of the pin illustration in Figure 1;

Figure 3 is an elevational view of the loop end of the pin illustrated in Figure 1;

Figure 4 is an elevational view of the open end of the pin illustrated in Figure 1;

Figure 5 is a top plan view of another form of bobby pin; and

Figure 6 is an enlarged fragmentary sectional view taken along the line 6-8 of Figure 5.

In the drawings, Figures 1 to 4 inclusive illustrate a bobby pin formed of a narrow band Ill of resilient material, such, for example, as metal, plastics, hard rubber and the like. An intermediate portion of the narrow band It is looped, as at II, through the greater part of two complete turns so that the remaining end portions of the band extend in one direction as a pair of legs I2 and I3 which are constantly urged in the direction to contact each other along their inner faces.

One leg I2 is longer than the other and outwardly bowed. The surfaces of this leg are substantially unmodified. The other leg I3 is provided with a plurality of V-shaped, arcuate or other similarly shaped crimps I4 arranged in a longitudinal row along the arm in angular relation with both the longitudinal and transverse aXes. Alternate crimps may be formed in parallel relation with each other but in angular relation with adjacent crimps. Although they may lClaim. (oi.132. 50)

be'formed atangles ranging from Oto degrees with the transverse axis, they preferably are at angles of &5 degrees'so that the adjacent hair receiving channels I 5 extend substantially in perpendicular relation to eachother. The end por tion of the leg I3 is turnedoutwardly in the form of a lip I6 which diverges from the firstleg I2. Itis apparent that the loopingconnection II provides greater flexibility to gthe; arms; I2 and it. Yet, in operation, less fiexingzactually takes place per unit length of material in the connection, so that fatigue and permanent deformation are substantially reduced. As a result, the spring forces urging the legs together are more uniform throughout the life of the pin, which, by means of this arrangement is materially extended.

When in the hair gripping position, the bundles of hair, which are disposed in the longitudinally spaced channels I5, operate effectively to militate against relative longitudinal movement of the pin until the legs are forced apart. This is because the hair bundles do not readily pass from one channel to the next in View of the restricted space between the substantially contacting inner faces of the legs in the area between the channels. By means of these same channels, adjacent hair bundles are angularly disposed with relation to each other, each hair bundle converging towards one and diverging from the other of the adjacent hair bundles and, as a result, the pin is effectively held against relative transverse movement. As an illustration, when the pin is shifted, while in its gripping position, in the direction towards the roots of the hairs engaged therein, the hairs disposed in channel a are drawn apart from the hairs in channel I) and the hairs in channel 0 are drawn towards the hairs in channel I). Since the hair roots are stationarily anchored to the scalp, it is evident that the forces moving the pin must overcome the effort required for the readjustment of some of the hairs from one channel to the next adjacent channel.

Another modification of pin embodying the salient features of this invention is shown in Figures 5 and 6. In the main, the pin is substantially the same as that described, the differences residing in the construction and arrangement of the shorter leg I3a. In this modification, multiple serrations 20 or grooves are provided on the inner face along the length of the leg I3a which, being substantially straight, is adapted to abut the other leg I2a throughout the greater portion of its length. A lip IBa is formed on the end of the straight portion to aid in separating the legs in use. 'These serrations are arranged angularly with respect to the transverse and longitudinal axes of the leg. A group, suchior example, as three serrations, may be arranged adjacent each other in parallel relation but in angular relation with the next adjacent groups, or else, the adjacent serrations may each be in angular relation. wtth eaeitzotherzr either case, there is provided on the inner fa'eeof the arm l-3a multiple angularly arranged grooves which operate in combination with the hairs disposed be-- tween the legs to hold the pin and hairs against;

relative movement in any direction.

It is manifest that I haveipredlteed a new and the elements can be mafiwwitfieut d'eparting'fromo 1n the appende What I el aimiis z" the spirit 6f the" invention especially as i dfified A bobby pin comprising a strip of substantially Y flat spring metal bent up itself to provide a pair.

of hair gripping arms normally urged toward each other, a plurality of straight grooves in the inner face of one of said arms, said grooves extending generally diagonally across said arm from edge to edge of said arm, some of said grooves extending in on'eidirection-aarrd'ntherszin a difierent dire'ction' whereby saitlgroovesconverge toward an edge of the said one arm and others converge toward the opposite edge, of said one arm so as to deter broadside slippage of said pin with respeet to the hair gripped thereby.

Y PRGBERT N. 'GERNHEUSER.

YREEERENCES CITED 7 1 fillhe foll'owirm references are of record in the i I fifilie of -this patent:

] "UNITED STATES PATENTS Germany Aug, .'3, 1920 

